On arrival into lga the PNF was off the center frequency getting the ATIS and talking to company. During that time a clearance was acknowledged by the PF to cross somto at 13000 ft. The altitude had been set on the MCP, but, to cross ard in the FMC instead of somto which is 10 mi earlier. ATC questioned the altitude but the flight crew had already missed the restr. The reporter suggested some procedure needs to exist that assures the new clearance is thoroughly briefed.

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Attributes
ACN	331750
Time
Date	199603
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ard
State Reference	PA
Altitude	msl bound lower : 13000 msl bound upper : 15000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 240 flight time total : 11000 flight time type : 4000
ASRS Report	331750
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On arrival to the lga terminal area, as the PNF, I was off the center frequency copying the ATIS and communicating with company operations. During that time clearance was given and acknowledged by the captain to cross somto at 13000 ft. Our current altitude was FL260. Upon returning to the center frequency, I questioned the new altitude set in the mode control panel (13000 ft), but failed to verify that altitude had been properly set in the FMC. It had been set to cross ard at 13000 ft instead of somto, 10 mi earlier. ATC questioned our altitude at which time we discovered that we had missed our crossing restr. There was no conflict. I would suggest some type of verbal requirement between pilots to ensure that all clrncs will be complied with in sits where one pilot is absent from the center frequency. This should possibly include a statement of 'briefing complete,' when all changes are voiced.

Original NASA ASRS Text

Title: ON ARR INTO LGA THE PNF WAS OFF THE CTR FREQ GETTING THE ATIS AND TALKING TO COMPANY. DURING THAT TIME A CLRNC WAS ACKNOWLEDGED BY THE PF TO CROSS SOMTO AT 13000 FT. THE ALT HAD BEEN SET ON THE MCP, BUT, TO CROSS ARD IN THE FMC INSTEAD OF SOMTO WHICH IS 10 MI EARLIER. ATC QUESTIONED THE ALT BUT THE FLC HAD ALREADY MISSED THE RESTR. THE RPTR SUGGESTED SOME PROC NEEDS TO EXIST THAT ASSURES THE NEW CLRNC IS THOROUGHLY BRIEFED.

Narrative: ON ARR TO THE LGA TERMINAL AREA, AS THE PNF, I WAS OFF THE CTR FREQ COPYING THE ATIS AND COMMUNICATING WITH COMPANY OPS. DURING THAT TIME CLRNC WAS GIVEN AND ACKNOWLEDGED BY THE CAPT TO CROSS SOMTO AT 13000 FT. OUR CURRENT ALT WAS FL260. UPON RETURNING TO THE CTR FREQ, I QUESTIONED THE NEW ALT SET IN THE MODE CTL PANEL (13000 FT), BUT FAILED TO VERIFY THAT ALT HAD BEEN PROPERLY SET IN THE FMC. IT HAD BEEN SET TO CROSS ARD AT 13000 FT INSTEAD OF SOMTO, 10 MI EARLIER. ATC QUESTIONED OUR ALT AT WHICH TIME WE DISCOVERED THAT WE HAD MISSED OUR XING RESTR. THERE WAS NO CONFLICT. I WOULD SUGGEST SOME TYPE OF VERBAL REQUIREMENT BTWN PLTS TO ENSURE THAT ALL CLRNCS WILL BE COMPLIED WITH IN SITS WHERE ONE PLT IS ABSENT FROM THE CTR FREQ. THIS SHOULD POSSIBLY INCLUDE A STATEMENT OF 'BRIEFING COMPLETE,' WHEN ALL CHANGES ARE VOICED.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.